Reliability assessment method of distribution network considering load characteristics and distributed power supply access

A technology of distributed power supply and load characteristics, applied in the field of electric power, can solve the problems of insufficient consideration of load characteristics and difficult to reflect the operation state of the distribution network, and achieve the effect of improving the prediction results of reliability indicators and having a wide range of applications.

Active Publication Date: 2018-12-28
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The existing distribution network reliability evaluation method does not consider the load characteristics comprehensively, and it is difficult to reflect the actual operation status of the distribution network, which has limitations.

Method used

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  • Reliability assessment method of distribution network considering load characteristics and distributed power supply access
  • Reliability assessment method of distribution network considering load characteristics and distributed power supply access
  • Reliability assessment method of distribution network considering load characteristics and distributed power supply access

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Embodiment 1

[0067] Such as figure 1 As shown, the flow chart of the distribution network reliability assessment method considering load characteristics and distributed power access includes the following steps: 1) Read in the connection topology, component parameters and load data of each component in the distribution network system ; 2) The typical daily load curves of four quarters are used to represent the user's load changes throughout the year, and the typical daily load curves are simplified sequentially by using the clustering-segmentation method, and the four categories of residential, commercial, agricultural, and industrial are sequentially obtained The user's load time series characteristic curves in the four seasons of spring, summer, autumn and winter; 3) Merge and simplify the set of components with common entrance components and the same fault effects to form distribution network feeder partitions, calculate the reliability parameters of the feeder area, and according to the...

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Abstract

The invention provides a reliability evaluation method of a distribution network considering load characteristics and distributed power supply access. The method fully considers the sequential load characteristics of different user types and different seasons, so that the evaluation result is more in line with the actual operation status of the power network. At the same time, the islanding supporting effect of DGAs on distribution network is also considered, which makes the evaluation method more applicable and can cope with more diverse distribution scenarios. Existing reliability assessmentof distribution network usually does not take into account the load sequence changes, the peak load is used for simulation, and the influence of the fault is inevitably amplified. The load characteristics such as load sequence characteristics and user type are considered in the reliability evaluation of the invention, so that the load point and the reliability index prediction result of the system can be improved, and the reliability index prediction result of the system is closer to the actual value.

Description

technical field [0001] The invention relates to the field of electric power technology, and more specifically, relates to a distribution network reliability evaluation method considering load characteristics and distributed power access. Background technique [0002] The distribution network is the last link between the system and the user. The reliability of the distribution network is one of the important indicators for power supply enterprises to assess the grid structure and reliability management level. Therefore, proposing a set of accurate and effective distribution network reliability evaluation methods is of great significance for improving the user's power consumption experience, finding out the weak links of the distribution network, and guiding the optimization construction and transformation of the distribution system. [0003] Load characteristics have an important impact on the reliability index of distribution network, but in traditional distribution network ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38G06F17/50
CPCG06F30/20H02J3/00H02J3/381H02J3/003H02J3/388H02J2203/20
Inventor 李慧刘昊罗容波曾庆辉章涛李国伟李新王云飞张思寒王俊波吴树鸿马榕嵘刘长江黄兆鹏
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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